Gennadi Nevelskoi, Russian navigator. In 1848 Nevelskoi led the expedition in the Russian Far East in the area of Sakhalin island and the outlet of Amur river. Not knowing about the efforts of Japanese navigator Mamiya Rinzo who explored the same area 40 years earlier, the Russian took Nevelskoi's report as the first proof that Sakhalin is indeed an island, and named Strait of Tartary in his honour, Strait of Nevelskoi.